This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A123992 #15 Mar 28 2020 04:28:11
%S A123992 1,40,106,133,250,265,271,280,295,313,418,580,691,736,748,826,946,
%T A123992 1231,1240,1435,1471,1561,1756,2023,2035,2038,2101,2575,2728,2878,
%U A123992 2926,3268,3400,3451,3688,3715,3883,4213,4306,4726,4936,5080,5398,5761,5908,6046
%N A123992 Numbers k such that 16*k+1, 16*k+3 and 16*k+13 are primes.
%H A123992 Amiram Eldar, <a href="/A123992/b123992.txt">Table of n, a(n) for n = 1..10000</a>
%p A123992 a:=proc(n) if isprime(16*n+1)=true and isprime(16*n+3)=true and isprime(16*n+13)=true then n else fi end: seq(a(n),n=1..5000); # _Emeric Deutsch_, Nov 03 2006
%t A123992 Select[Range[6100], And @@ PrimeQ /@ ({1, 3, 13} + 16#) &] (* _Ray Chandler_, Nov 05 2006 *)
%Y A123992 Cf. A092022.
%K A123992 nonn
%O A123992 1,2
%A A123992 _Artur Jasinski_, Oct 30 2006
%E A123992 Extended by _Ray Chandler_, Nov 05 2006